13/10 start fraction, 13, divided by, 10, end fraction of a number is what percentage of that number?

How do you answer this question? (step by step)

This is different from the first one can someone me

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)